CN103606643B - The negative plate of lithium ion battery and manufacture method, its manufacturing installation - Google Patents
The negative plate of lithium ion battery and manufacture method, its manufacturing installation Download PDFInfo
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- CN103606643B CN103606643B CN201310517737.6A CN201310517737A CN103606643B CN 103606643 B CN103606643 B CN 103606643B CN 201310517737 A CN201310517737 A CN 201310517737A CN 103606643 B CN103606643 B CN 103606643B
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 45
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000009434 installation Methods 0.000 title claims abstract description 17
- 239000011149 active material Substances 0.000 claims abstract description 49
- 238000005213 imbibition Methods 0.000 claims description 61
- 239000003792 electrolyte Substances 0.000 claims description 49
- 230000007246 mechanism Effects 0.000 claims description 26
- 230000000694 effects Effects 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000007779 soft material Substances 0.000 claims description 4
- 230000002427 irreversible effect Effects 0.000 abstract description 5
- 230000013011 mating Effects 0.000 abstract description 3
- 229910052744 lithium Inorganic materials 0.000 description 25
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 24
- 239000000843 powder Substances 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 6
- 239000006258 conductive agent Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 125000001979 organolithium group Chemical group 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 229910052718 tin Inorganic materials 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 229910003481 amorphous carbon Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000002001 electrolyte material Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The present invention is specifically related to negative plate and manufacture method, its manufacturing installation of lithium ion battery, wherein, the negative plate of lithium ion battery comprises negative pole collector plate, at least one of negative pole collector plate is coated with active material layer on the surface, it is characterized in that, the surface of at least one active material layer is provided with SEI film.The present invention arranges SEI film by the surface in advance at negative plate, effectively eliminate active material and there is larger irreversible capacity, thus the negative plate of manufacture is made to coincide with mating of positive electrode capacity, solve the problem that cathode performance can not play completely, improve the efficiency first of battery, and then the capacity improving battery also can improve the cycle performance of battery.
Description
[technical field]
The invention belongs to the manufacture method technical field of lithium ion battery, particularly relate to negative plate and manufacture method, its manufacturing installation of a kind of lithium ion battery.
[background technology]
Lithium ion battery be a kind of have high voltage, energy density high, have extended cycle life and the Portable environmental-protection battery of the feature such as security performance is good, be widely used in the portable electric appts such as mobile phone, video tape recorder, panel computer at present and have also been obtained certain application in electric automobile field.But along with the microminiaturization of portable electric appts, and the research and development of the powerful device such as electric automobile (EV) and hybrid-electric car (HEV) and application receive the attention of height, people require to have high power capacity and high-power characteristic to the lithium ion battery as power-supply system.
In order to reach high power capacity and high-power requirement, researcher has carried out large quantity research to lithium ion cell high-capacity negative material (as materials such as Sn, Si), for the cathode pole piece obtained by high-capacity material such as Sn, Si, part lithium source is consumed owing to there is larger irreversible capacity in the initial charge process of battery, the performance of positive electrode is caused not play completely thus, thus the capacity of battery is had reduce significantly, cause the efficiency first of battery to reduce.
In order to reduce the loss because of the battery capacity caused by the irreversible capacity of lithium ion battery in initial charge process, improve the efficiency first of battery, more existing documents patent reports some solutions at present.Such as publication number is that the Chinese patent application of 102916165A is mentioned in an inert atmosphere, by organolithium spray solution or drip in negative plate surface, make the lithium ion in organolithium solution be reduced into lithium metal and embed in negative plate, then dry negative plate.Although this invention is passed through even organolithium spray solution or is dripped on the surface of negative plate, achieve " wet method benefit lithium ", thus metallic lithium powder is aerial floating when effectively avoiding dry method benefit lithium, ensure production safety, and the amount of mending lithium accurately can be controlled by the time of the amount of the organolithium solution that sprays or drip, sprinkling or dropping, to reach the object of evenly mending lithium, what prevent negative plate analyses lithium and distortion, improve the efficiency first of battery, and then improve the energy density of battery.But because the whole technical process of this method all will be carried out in an inert atmosphere, cause complex procedures, harsh to environmental requirement, increase the cost of manufacture of cathode pole piece.
For another example publication number is that the Chinese patent application of 103208612A mentions a kind of method to anode plate for lithium ionic cell two-sided continuous supplementation lithium powder, filter screen vibration powder is utilized to make lithium powder evenly, quantitatively, accurately can be dispersed in two surfaces up and down of negative plate in conjunction with the principle of electrostatic effect, and through roll operation, the lithium powder filled is compacted to pole piece, thus anticathode sheet plays the effect of mending lithium.Although the method can play mend the effect of lithium, improve the capacity of battery, however due to lithium powder comparatively light, easily float in atmosphere, larger potential safety hazard can be caused to operating personnel.
In addition, the Japanese patent application of application number JP2008038720 mentions the surperficial evaporation layer of metal lithium layer utilizing the method for vacuum evaporation at negative plate, although the Thickness Ratio metal lithium sheet of the metallic lithium layer of evaporation is thin, but the thickness of the metallic lithium layer of evaporation is difficult to control in this process, and whole process must be carried out under vacuum conditions, evaporation efficiency is also lower, and the process of follow-up pole piece is also more complicated, and manufacturing cost is higher.
[summary of the invention]
First technical problem that the present invention will solve is to provide a kind of negative plate of lithium ion battery, and it can improve the capacity of lithium ion battery.
Second technical problem that the present invention will solve is to provide a kind of manufacture method of negative plate of lithium ion battery, simple to operate, low to environmental requirement, cost is low, be applicable to enterprise produce.
The 3rd technical problem that the present invention will solve is to provide a kind of manufacturing installation of negative plate of lithium ion battery, and structure is simple.
Above-mentioned first technical problem solves by the following technical programs:
The negative plate of lithium ion battery comprises a negative pole collector plate, and at least one of negative pole collector plate is coated with active material layer on the surface, it is characterized in that, the surface of at least one active material layer is provided with SEI film.
The present invention arranges SEI film by the surface in advance at negative plate, effectively eliminate active material and there is larger irreversible capacity, thus the negative plate of manufacture is made to coincide with mating of positive electrode capacity, solve the problem that cathode performance can not play completely, improve the efficiency first of battery, and then the capacity improving battery also can improve the cycle performance of battery.
Above-mentioned second technical problem solves by the following technical programs:
A manufacture method for the negative plate of lithium ion battery, is characterized in that, comprises the following steps:
1) on the surface of at least one active material layer of first pole piece, coating contains lithium ion Li
+electrolyte, described just pole piece comprises negative pole collector plate and is coated in the active material layer on two surfaces of negative pole collector plate;
2) by the positive terminal contact of DC power supply to the electrolyte at least one active material layer described, the negative terminal of DC power supply be connected to just on pole piece not with electrolyte contacts, under the effect of direct voltage, electrolyte and at least one active material layer described react, form SEI film on the surface of at least one active material layer described, then drying obtains negative plate.
The present invention by the Surface Creation SEI film of first pole piece to form negative plate, the negative plate of this structure effectively eliminates active material and there is larger irreversible capacity, thus the negative plate of manufacture is made to coincide with mating of positive electrode capacity, solve the problem that cathode performance can not play completely, improve the efficiency first of battery, and then the capacity improving battery also can improve the cycle performance of battery.And the present invention is simple to operate, just can carry out at the production site of drying, low to environmental requirement, cost is low, be applicable to enterprise produce.Mend compared with the method for lithium with utilizing lithium powder, negative plate can be prevented to be out of shape because of extruding, and accurately can control the consumption of lithium, what can not cause negative plate analyses lithium, causes potential safety hazard.
Above-mentioned 3rd technical problem can solve respectively by following two technical schemes:
The first scheme is: a kind of manufacturing installation of negative plate of lithium ion battery, it is characterized in that, comprise DC power supply, electrolyte supplementary mechanism, two pole piece coiling wheels that left and right is put, and conductivity imbibition roller, the conductivity supporting piece be located between two winding mechanisms, conductivity imbibition roller and conductivity supporting piece are oppositely arranged up and down, electrolyte supplementary mechanism provides electrolyte to conductivity imbibition roller, and conductivity imbibition roller, conductivity supporting piece are connected respectively anode, the negative terminal of DC power supply.
First scheme is: a kind of manufacturing installation of negative plate of lithium ion battery, it is characterized in that, comprise DC power supply, two electrolyte supplementary mechanisms, two pole piece coiling wheels that left and right is put, and the first conductivity imbibition roller be located between two winding mechanisms, second conductivity imbibition roller, conductivity supporting piece, first conductivity imbibition roller and the second conductivity imbibition roller are oppositely arranged up and down, the operating state of the second conductivity imbibition roller be rotate clockwise or counterclockwise time conductivity supporting piece be correspondingly placed in left side or the right side of the second conductivity imbibition roller, two electrolyte supplementary mechanisms are corresponding to the first conductivity imbibition roller respectively, second conductivity imbibition roller provides electrolyte, first conductivity imbibition roller is connected the anode of DC power supply with the second conductivity imbibition roller, conductivity supporting piece connects the negative terminal of DC power supply.
From such scheme, manufacturing installation framework of the present invention is simple, and operation uses simple.
The further scheme of above-mentioned first scheme and alternative plan is, described conductivity imbibition roller is provided with internal layer and outer perisphere, and outer perisphere is absorbency soft material layer, and internal layer is the material layer of hard, conductivity, non-anodic solution.
[accompanying drawing explanation]
Fig. 1 is the cutaway view of embodiment one negative plate;
Fig. 2 is the schematic diagram of embodiment one manufacturing installation;
Fig. 3 is the cutaway view of embodiment two negative plate;
Fig. 4 is the schematic diagram of embodiment two manufacturing installation.
[embodiment]
Embodiment one
As shown in Figure 1, a kind of negative plate of lithium ion battery comprises negative pole collector plate 11, and two surfaces of negative pole collector plate are coated with active material layer 12, and the surface of one of them active material layer is provided with SEI film 13.
A manufacture method for the negative plate of lithium ion battery, comprises the following steps:
1) on the surface of an active material layer of first pole piece, coating contains lithium ion Li
+electrolyte, described just pole piece comprises negative pole collector plate and is coated in the active material layer on two surfaces of negative pole collector plate;
2) by the positive terminal contact of DC power supply to the electrolyte on an above-mentioned active material layer, the negative terminal of DC power supply be connected to just on pole piece not with electrolyte contacts, under the effect of direct voltage, electrolyte and a described active material layer react, form SEI film on the surface of a described active material layer, then drying obtains negative plate.For the method for drying, freely can be designed according to the known technology of this area by those skilled in the art, such as, can natural drying in the environment of drying.
The principle of said method is: under the effect of direct voltage, the active material layer of lithium ion and first pole piece reacts, SEI film is formed on the surface of active material layer, and have in the Lithium-ion embeding active layer of a small amount of part, owing to being pre-formed SEI film on negative plate, improve the efficiency first of battery, this is very necessary to the raising of battery capacity.
As shown in Figure 2, the manufacturing installation of above-mentioned negative plate, comprise DC power supply, electrolyte supplementary mechanism 8, two pole piece coiling wheels 7 that left and right is put, and be located at conductivity imbibition roller 4, the conductivity supporting piece 2 between two winding mechanisms, conductivity imbibition roller 4 and conductivity supporting piece about 2 are oppositely arranged, electrolyte supplementary mechanism 4 provides electrolyte to conductivity imbibition roller 4, and conductivity imbibition roller 4, conductivity supporting piece 2 connect the positive and negative two ends of DC power supply respectively.
Conductivity imbibition roller is provided with internal layer and outer perisphere, and outer perisphere is absorbency soft material layer, and internal layer is the material layer of hard, conductivity, non-anodic solution, and such as, internal layer is graphite or surface gold-plating stainless steel.
Use above-mentioned manufacturing installation to manufacture the method for negative plate as shown in Figure 2, comprise the following steps:
11) first pole piece 1 is placed on two winding mechanisms 7, first pole piece 1 is between conductivity imbibition roller 4 and conductivity supporting piece 2, two surfaces up and down of first pole piece contact conductivity imbibition roller 4 and conductivity supporting piece 2 respectively, and are positioned in electrolyte supplementary mechanism 8 by the electrolyte containing lithium ion;
12) winding mechanism 7 and DC power supply is started, first pole piece 1 moves to the left or to the right, electrolyte supplementary mechanism 8 adds electrolyte on conductivity imbibition roller 4, because conductivity imbibition roller 4, conductivity supporting piece 2 connect the positive and negative two ends of DC power supply respectively, first pole piece is added with direct voltage, under the effect of direct voltage, the active material layer generation electrochemical reaction of electrolyte and negative plate, forms SEI film on the surface of first pole piece; Drying obtains negative plate again.
In the present embodiment, lithium ion Li is contained described
+electrolyte in, lithium ion Li
+concentration be 1-3mol/L.Electrolyte comprises solute and solvent, and solute is that the ethylene carbonate (EC) of 1:1 and diethyl carbonate (DEC) form by mass ratio, and solvent is lithium hexafluoro phosphate LiPF
6.
Voltage control between plus end and negative terminal is at 0.5V-1.5V.
Above-mentioned negative pole collector plate is Copper Foil.Active material layer comprises active material, conductive agent and binding agent and forms, and active material, part by weight between conductive agent and binding agent three are (91-97): (1-4): (1-5).Active material is one or more in graphite or amorphous carbon, Sn, Si.After the mixing of active material, conductive agent and binding agent, be coated on Copper Foil and form active material layer, thus make just pole piece.
Embodiment two
As shown in Figure 3, a kind of negative plate of lithium ion battery comprises negative pole collector plate 51, and two surfaces of negative pole collector plate are coated with active material layer 52, and the surface of two active material layers is equipped with SEI film 53.
A manufacture method for the negative plate of lithium ion battery, comprises the following steps:
1) on the surface of two active material layers of first pole piece, coating contains lithium ion Li
+electrolyte, described just pole piece comprises negative pole collector plate and is coated in the active material layer on two surfaces of negative pole collector plate;
2) by the positive terminal contact of DC power supply to the electrolyte on two active material layers, the negative terminal of DC power supply be connected to just on pole piece not with electrolyte contacts, under the effect of direct voltage, electrolyte and active material layer react, and all form SEI film on the surface of two active material layers; Drying obtains negative plate again.
The principle of said method is: under the effect of direct voltage, the active material layer of lithium ion and first pole piece reacts, SEI film is formed on the surface of active material layer, and have in the Lithium-ion embeding active layer of a small amount of part, owing to being pre-formed SEI film on negative plate, improve the efficiency first of battery, this is very necessary to the raising of battery capacity.
As shown in Figure 4, the manufacturing installation of above-mentioned negative plate, comprise DC power supply, two electrolyte supplementary mechanisms 8, two pole piece coiling wheels 7 that left and right is put, and the first conductivity imbibition roller 41 be located between two winding mechanisms, second conductivity imbibition roller 42, conductivity supporting piece 22, first conductivity imbibition roller 41 and the second conductivity imbibition roller about 42 are oppositely arranged, the operating state of the second conductivity imbibition roller 42 be rotate clockwise or counterclockwise time conductivity supporting piece 22 be correspondingly placed in the left side of the second conductivity imbibition roller 42 or the position of conductivity supporting piece 22 (is determined in right side according to the rotation direction of the second conductivity imbibition roller 42, because do not touch containing lithium ion Li when guaranteeing that conductivity supporting piece 22 contacts first pole piece
+electrolyte), two electrolyte supplementary mechanisms 8 respectively corresponding first conductivity imbibition roller 41, second conductivity imbibition roller 42 of giving provide electrolyte, first conductivity imbibition roller 41 is connected the anode of DC power supply with the second conductivity imbibition roller 42, and conductivity supporting piece 22 connects the negative terminal of DC power supply.
Conductivity imbibition roller is provided with internal layer and outer perisphere, and outer perisphere is made up of absorbency soft material, and internal layer is made up of the material of hard, conductivity, non-anodic solution, and such as, internal layer is graphite or surface gold-plating stainless steel.
Use above-mentioned manufacturing installation to manufacture the method for negative plate, comprise the following steps:
11) first pole piece is placed on two winding mechanisms 7, first pole piece is between the first conductivity imbibition roller 41 and the second conductivity imbibition roller 42 and be positioned at above conductivity supporting piece 22, the upper surface of first pole piece contacts the first conductivity imbibition roller 41, the lower surface of first pole piece contacts the second conductivity imbibition roller 42, two conductivity supporting pieces 22, is positioned over by the electrolyte containing lithium ion in electrolyte supplementary mechanism 8;
12) winding mechanism 7 and DC power supply is started, first pole piece moves right, two electrolyte supplementary mechanisms 8 add electrolyte accordingly on the first conductivity imbibition roller 41, second conductivity imbibition roller 42, because the first conductivity imbibition roller 41, second conductivity imbibition roller 42 and conductivity supporting piece 22 connect the positive and negative two ends of DC power supply respectively, first pole piece is added with direct voltage, under the effect of direct voltage, the active material layer generation electrochemical reaction of electrolyte and negative plate, forms SEI film on the surface of first pole piece; Drying obtains negative plate again.
In the present embodiment, lithium ion Li is contained described
+electrolyte in, lithium ion Li
+concentration be 1-3mol/L.Electrolyte comprises solute and solvent, and solute is that the ethylene carbonate (EC) of 1:1 and diethyl carbonate (DEC) form by mass ratio, and solvent is lithium hexafluoro phosphate LiPF
6.
Voltage control between plus end and negative terminal is at 0.5V-1.5V.
Above-mentioned negative pole collector plate is Copper Foil.Active material layer comprises active material, conductive agent and binding agent and forms, and active material, part by weight between conductive agent and binding agent three are (91-97): (1-4): (1-5).Active material is one or more in graphite or amorphous carbon, Sn, Si.After the mixing of active material, conductive agent and binding agent, be coated on Copper Foil and form active material layer, thus make just pole piece.
The present invention is not limited to above-described embodiment, based on above-described embodiment, the simple replacement of not making creative work, the scope that the present invention discloses should be belonged to.
Claims (5)
1. a manufacture method for the negative plate of lithium ion battery, is characterized in that, comprises the following steps:
1) electrolyte of coating containing lithium ion on the surface of at least one active material layer of first pole piece, described just pole piece comprises negative pole collector plate and is coated in the active material layer on two surfaces of negative pole collector plate;
2) by the positive terminal contact of DC power supply to the electrolyte at least one active material layer described, the negative terminal of DC power supply be connected to just on pole piece not with electrolyte contacts, under the effect of direct voltage, electrolyte and at least one active material layer described react, form SEI film on the surface of at least one active material layer described, then drying obtains negative plate.
2. the manufacture method of the negative plate of a kind of lithium ion battery according to claim 1, is characterized in that, described containing in the electrolyte of lithium ion, the concentration of lithium ion is 1-3mol/L.
3. the manufacturing installation of the negative plate of a lithium ion battery, it is characterized in that, comprise DC power supply, electrolyte supplementary mechanism, two pole piece coiling wheels that left and right is put, and be located at conductivity imbibition roller, the conductivity supporting piece between two winding mechanisms, conductivity imbibition roller and conductivity supporting piece are oppositely arranged up and down, electrolyte supplementary mechanism provides electrolyte to conductivity imbibition roller, and conductivity imbibition roller, conductivity supporting piece are connected respectively anode, the negative terminal of DC power supply.
4. the manufacturing installation of the negative plate of a lithium ion battery, it is characterized in that, comprise DC power supply, two electrolyte supplementary mechanisms, two pole piece coiling wheels that left and right is put, and the first conductivity imbibition roller be located between two winding mechanisms, second conductivity imbibition roller, conductivity supporting piece, first conductivity imbibition roller and the second conductivity imbibition roller are oppositely arranged up and down, first conductivity imbibition roller is upper, second conductivity imbibition roller under, the operating state of the second conductivity imbibition roller be rotate clockwise or counterclockwise time conductivity supporting piece be correspondingly placed in left side or the right side of the second conductivity imbibition roller, two electrolyte supplementary mechanisms are corresponding to the first conductivity imbibition roller respectively, second conductivity imbibition roller provides electrolyte, first conductivity imbibition roller is connected the anode of DC power supply with the second conductivity imbibition roller, conductivity supporting piece connects the negative terminal of DC power supply.
5. a kind of manufacturing installation of negative plate of lithium ion battery according to claim 3 or 4, it is characterized in that, described conductivity imbibition roller is provided with internal layer and outer perisphere, and outer perisphere is absorbency soft material layer, and internal layer is the material layer of hard, conductivity, non-anodic solution.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969528A (en) * | 2011-08-31 | 2013-03-13 | 三星Sdi株式会社 | Lithium secondary battery |
| CN202888314U (en) * | 2012-09-20 | 2013-04-17 | 东莞新能源科技有限公司 | Device for processing anode strip of lithium ion battery |
| CN203826478U (en) * | 2013-10-28 | 2014-09-10 | 珠海光宇电池有限公司 | Negative pole piece of lithium ion battery |
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2013
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969528A (en) * | 2011-08-31 | 2013-03-13 | 三星Sdi株式会社 | Lithium secondary battery |
| CN202888314U (en) * | 2012-09-20 | 2013-04-17 | 东莞新能源科技有限公司 | Device for processing anode strip of lithium ion battery |
| CN203826478U (en) * | 2013-10-28 | 2014-09-10 | 珠海光宇电池有限公司 | Negative pole piece of lithium ion battery |
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